Box-bearing for fast-rotating shafts.



PA TBNTBD JULY 17, 1906.

APPLICATION FILED MAR- B. 1903.

2 SHEETS-SHEET 1 x Us A w w K w a My a PATENTED JULY 1 7, 1906.

2 SHEETS-SHEET 2.

0. L. HOLM.. v BOX BEARING FOR FAST ROTATING SHAFTS.

APPLIOAITION FILED MAR. 6, 1903.

UNITED STATES PATENT OFFICE.

CARL LUDVIG HOLM, OF STOGKHOLM, SWVEDEN, ASSIGNOR TO NYA AKTIEBOLAGET RADIATOR, OF STOOKHOLM, SWEDEN.

Specification of Letters Patent.

Patented July 17, 1906.

Application filed March 6, 1903. Serial No. 146,581.

aZZ whom it nuty concern.-

Be it known that I, CARL LUDVIG HOLM, a

if subject of the King of Sweden and Norway,

- The said bushing may suitably be providedand a resident of Stockholm, Sweden, have invented a new and useful Improvement in Box-Bearings for Fast-Rotating Shafts, of which the following is a specification, reference being had to the drawings accompanying and forming a part hereof.

This invention relates to box-bearings for fast-rotating shafts, such as centrifugal drumshafts and the like.

The object of the present invention is to provide a box-bearing which will be simple in its construction and reliable in the performance of its function.

The invention consists, briefly, in having in one element of the bearing one or more cups or holders containing liquidssuch as glycerin, oil, and the likeand fixed in relation to the bearing and in attaching one or more projections to the other element of the bearing, so that the same will project into the liquids of the said holders. The said cups or holders are of such dimensions that the hearing may deflect from its central position sufficient enough to correspond to the oscillations or vibrations of the shaft, the liquid thereby offering a certain resistance against the side movements of the projections, so as to assist the centration of the shaft.

The invention also consists in the combinations and arrangements of parts hereinafter described and claimed.

The same reference-figures denote the same or corresponding parts throughout.

In the accompanyingdrawings I have illustrated some w ys of carrying out my invent1on. I

Figures 1, 2, and 3 show each a constructional form of the same in vertical sections.

1, 1 and 1 represent the bushing of the box-bearing, which incloses a spindle or shaft 2 of a centrifugal drum or any other fast-rotating part requiring automatic centration.

with a ring-shaped downwardly-projecting flange or collar 3, 3 and 3 entering a ringshaped liquid-holder 4, 4 and 4 in any fixed part or parts surrounding the bushing 1, 1*, and 1 The said liquid-holder may, as shown, be arranged in a bottom 5, 5 and 5 forming a part of or attached to the frame of the machine, and in a plate 6, 6 and 6 ,flxed to the said bottom by means of screws 10 or the like, serving to prevent the axial movement of the bushing. In the drawings I have shown three different shapes of the said flange or collar 3, 3, and 3 but it is obvious that the same may be of any desired shape, the latter depending, essentially, on the different liquid resistance required for different purposes. The part of the flange or collar 3, 3, and 3 projecting into the liquid of the ,said holder 4, 4, and 4 is of somewhat smaller dimensions than the latter, so that the collar has a certain play in the said holder,

the bushing having thus opportunity to partake in the eventual vibrations of the shaft. The bushing may be revented'from touching the bottom of the iquid-holder 4, 4 and 4 for instance, by means of lugs or the like (not shown) provided on the machine-frame, against which lugs or the like the lower end of the bushing may bear. The resistance of the liquid against side movements of the shaft, bushing, and projections acts as a piston in a dash-pot, so as to prevent sudden deflections of the shaft from its central position, but will permit the automatic centration of the shaft. The liquid which I prefer to use is glycerin or oil; but obviously, also, other liquids may be used. The two ring-shaped chambers of the holder 4, 4 and 4*, divided from each other by the flange or collar 8, 3 and 3*, form two communicating vessels, and the liquid introduced in the said. holder 4, 4*, and 4 will be retained to a level, depending on the height of the inner wall 7 of the holder 4, 4 and 4 The said wall 7 should preferably reach somewhat above one-half of the height of the said flange or collar 3, 3 and 3 The bushing 1, 1, and 1 may be prevented from partakin in the rotation of the shaft 2 by any suitab e means, such as one or more pins 8, fixed in the bottom 5, 5 and 5 and engaging with corresponding borings or recesses 9, 9, and 9 in the flange 3, 3, and 3 The said pins may preferably be made so weak as to be broken off, so as to allow the bushing to rotate with the shaft in case the bearing should happen to run hot. The said borings or recesses maybe somewhat wider than the pins, so as to give the bushing the necessary play.

11 represents a groove for introducing oil in the bearing.

The bearing device described above is put in order and Works in the following manner: After the bushing 1 1 and 1 b has been inserted from above and turned until the pin 8 engages the recess 9, 9, and 9 the plate 6, 6, and 6 is fixed to the bottom 5, 5*, and 5 by means of the screws 10. As easily understood, the fixing of the plate 6, 6 and 6 requires no special accuracy. The liquid is thereupon poured into the liquid-holder 4, 4, and 4 When the shaft is put in motion and the bushing, on account of the vibrations of the shaft, is moved sidewise, the liquid will check such movements without preventing the centration of the shaft, It may happen that a part of the liquid will thereby be forced over the edge of the wall 7, and therefore new liquid should from time to time be poured into the liquidholder 4, 4*, and 4 The arrangement described above and illustrated in the drawings may obviously be reversed, so that the liquid-holder is arranged in the bushing, while the parts projectmg into the said liquid-holder are provided on the fixed parts surrounding the bushing.

Having now described my invention and in what manner the same may be performed,

What I claim as new, and desire to secure by Letters Patent, is

A shaft-centering device comprising a perforated member having a groove around said perforation, the groove forming a fluidholder, a shaft-bushin having an annular flange loosely entering t e fluid-holder, a second perforated member fitted over the first perforated member, and means to prevent the bushing from rotating with the shaft.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

CARL LUDVIG HOLM.

Witnesses:

JoH T DELMAR, KARL RUNosKoe. 

